diff --git a/src/types/IChatterboxConfig.ts b/src/types/IChatterboxConfig.ts
index bf0bd8e302333af9955225b500d0b559094fa989..77e7d4e37a0007bb0dade8e090921488ad31f46f 100644
--- a/src/types/IChatterboxConfig.ts
+++ b/src/types/IChatterboxConfig.ts
@@ -1,5 +1,7 @@
 export interface IChatterboxConfig {
 	homeserver: string;
+    // internal room-id of the room to which chatterbox should join
 	auto_join_room: string;
+    // string that is to be prepended to the generated random usernames
     username_prefix: string;
 }